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Method for preparing mixed product of carbonate and lithium sulfate from manganese-containing waste liquid

A carbonate and lithium sulfate technology, which is applied in the treatment and utilization of manganese-containing waste liquid, can solve problems such as waste of resources, achieve the effects of eliminating pollution, reducing equipment investment, and improving economic benefits

Inactive Publication Date: 2011-07-06
何云
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, other chemical constituents in hydroquinone are not utilized, thereby wasting resources

Method used

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Effect test

Embodiment 1

[0022] A method for preparing a mixed product of carbonate and lithium sulfate with manganese-containing waste liquid, wherein the manganese-containing waste liquid is the manganese-containing waste liquid obtained from the production of hydroquinone, comprising the following specific steps:

[0023] Step A: Suction filtration of 500 kg of manganese-containing waste liquid obtained from the production of hydroquinone to obtain a clarified filtrate containing manganese sulfate, ammonium sulfate, sulfuric acid and a filter cake containing elemental residues, and the filtrate will be developed into other products;

[0024] Step B: the filter cake containing elemental residue is reacted with excess sulfuric acid to obtain a solution containing calcium sulfate, magnesium sulfate, zinc sulfate, sodium sulfate, aluminum sulfate, cadmium sulfate and nickel sulfate, and then mixed with lithium carbonate solution, and Make the molar content sum of the material of sulfate in the solution ...

Embodiment 2

[0029] A method for preparing a mixed product of carbonate and lithium sulfate with manganese-containing waste liquid, wherein the manganese-containing waste liquid is the manganese-containing waste liquid obtained from the production of hydroquinone, comprising the following specific steps:

[0030] Step A: Suction filtration of 500 kg of manganese-containing waste liquid obtained from the production of hydroquinone to obtain a clarified filtrate containing manganese sulfate, ammonium sulfate, sulfuric acid and a filter cake containing elemental residues, and the filtrate will be developed into other products;

[0031] Step B: the filter cake containing elemental residue is reacted with excess sulfuric acid to obtain a solution containing calcium sulfate, magnesium sulfate, zinc sulfate, sodium sulfate, aluminum sulfate, cadmium sulfate and nickel sulfate, and then mixed with lithium carbonate solution, and Make the molar content sum of the material of sulfate in the solution ...

Embodiment 3

[0036] A method for preparing a mixed product of carbonate and lithium sulfate with manganese-containing waste liquid, wherein the manganese-containing waste liquid is the manganese-containing waste liquid obtained from the production of hydroquinone, comprising the following specific steps:

[0037] Step A: Suction filtration of 500 kg of manganese-containing waste liquid obtained from the production of hydroquinone to obtain a clarified filtrate containing manganese sulfate, ammonium sulfate, sulfuric acid and a filter cake containing elemental residues, and the filtrate will be developed into other products;

[0038] Step B: the filter cake containing elemental residue is reacted with excess sulfuric acid to obtain a solution containing calcium sulfate, magnesium sulfate, zinc sulfate, sodium sulfate, aluminum sulfate, cadmium sulfate and nickel sulfate, and then mixed with lithium carbonate solution, and Make the ratio of the molar content sum of the material of sulfate in ...

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Abstract

The invention provides a method for preparing a mixed product of carbonates and lithium sulfate from a manganese-containing waste liquid. The manganese-containing waste liquid generated during the production of hydroquinone is filtered to produce a clear filtrate containing manganese sulfate, ammonium sulfate and sulfuric acid and a filter cake containing simple substance residues; the filter cake containing the simple substance residues reacts with an excessive amount of sulfuric acid to produce a liquid containing calcium sulfate, magnesium sulfate, zinc sulfate, sodium sulfate, aluminum sulfate, cadmium sulfate and nickel sulfate; then the liquid mixes and reacts with a lithium carbonate liquid to produce a mixed liquid of lithium sulfate and carbonates including calcium carbonate, magnesium carbonate, zinc carbonate, sodium carbonate, aluminum carbonate, cadmium carbonate and nickel carbonate; the mixed liquid is filtered to produce a filter cake of calcium carbonate and a filtrate containing carbonates and lithium sulfate; and the filtrate containing carbonates and lithium sulfate is distilled under a reduced pressure and cooled to crystallize mixed carbonate crystals and lithium sulfate crystals, and the crystallization product is filtered and separated to obtain a mixed product of carbonates and lithium sulfate.

Description

technical field [0001] The invention relates to the technical field of treatment and utilization of manganese-containing waste liquid, especially a method for preparing a mixed product of carbonate and lithium sulfate with manganese-containing waste liquid. The manganese-containing waste liquid is manganese-containing waste obtained from the production of hydroquinone liquid. Background technique [0002] Hydroquinone is an important organic intermediate, which was developed in my country in the 1970s and has been put into industrial production. At present, hydroquinone is mainly produced by the aniline-manganese dioxide process in China. Compared with the foreign phenol-hydrogen peroxide process, this process has the advantages of high product purity and less impurities. But its disadvantage is that the discharge of waste liquid is large. Under normal conditions, there are about 40 tons of manganese-containing wastewater for every ton of hydroquinone produced. The chemic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18C01F5/24C01G9/00C01D7/00C01F7/00C01G11/00C01G53/06C01D15/06
Inventor 何云
Owner 何云
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